Merge pull request #13150 from owncloud/fix-sharing-activity-extension

Correctly return false when translating a foreign activity

apps/files_sharing/lib/activity.php

@@ -91,10 +91,6 @@ class Activity implements \OCP\Activity\IExtension {
 
 		$l = \OC::$server->getL10N('files_sharing', $languageCode);
 
-		if (!$text) {
-			return '';
-		}
-
 		if ($app === 'files_sharing') {
 			switch ($text) {
 				case self::SUBJECT_REMOTE_SHARE_RECEIVED:
@@ -111,6 +107,8 @@ class Activity implements \OCP\Activity\IExtension {
 					return $l->t('Public shared file %1$s was downloaded', $params)->__toString();
 			}
 		}
+
+		return false;
 	}
 
 	/**